How do you prevent and control rapeseed viral disease in rapeseed cultivation?
What harm does rapeseed viral disease cause? How do you prevent and control rapeseed viral disease? Please explain. Viral disease is one of the main diseases of rapeseed. Affected plants reduce yield by about 20%, and in severe cases by more than 70%. It is generally more susceptible in years with little rain or in areas where vegetables are often grown nearby. Methods for preventing and controlling rapeseed viral disease: ...
What harm does rapeseed viral disease cause? How do you prevent and control rapeseed viral disease? Please explain.Viral disease is one of the main diseases of rapeseed. Affected plants reduce yield by about 20%, and in severe cases by more than 70%. It is generally more susceptible in years with little rain or in areas where vegetables are often grown nearby.
Methods for preventing and controlling rapeseed viral disease:
1. Select disease-resistant varieties.
2. Control aphids promptly, because aphids are the main factor causing viral disease.
3. Preventing infection at the seedling stage is the key to control. During the 3-9 leaf stage of rapeseed, while controlling aphids, use 24% mixed fatty acid copper (Duxiao) at 800 times dilution or 7.5% moroxydine copper (Keduling) at 500 times dilution. Choose either of the above pesticides and alternate their use for 2 treatments, which can effectively control the damage of rapeseed viral disease.
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